JP2022048871A - Mounting structure of grating lid on resin trough body, trough line, method for forming trough line, and grating lid - Google Patents

Abstract

A structure for attaching a grating lid to a trough body, a trough track, a method for forming the trough track, and a grating lid are provided, which are excellent in handleability and load resistance. A resin-made trough body 3 has a substantially U-shaped cross section having a bottom portion 9 and side portions 7 on both sides. On the outer surface of both side portions 7 of the trough body 3 having a predetermined length, longitudinal ribs 11 for reinforcement are formed at predetermined intervals. A horizontal rib 13 is formed near the front and rear ends of the trough body 3 so as to connect the two vertical ribs 11 . By bolting the pair of L-shaped members 23 to the fixing metal fittings 19 attached to the lateral ribs 13, an accommodation space in which the grating lid 5 is accommodated is formed. The grating lid 5 is accommodated in this accommodation space, and is fixed to a bolt fixing portion which is a mounting hole 25b formed in the horizontal surface of the L-shaped member 23. As shown in FIG. [Selection drawing] Fig. 1

Description

The present invention relates to a structure for attaching a grating lid to a resin trough body, a trough line, a method for forming a trough line, and a grating lid in a trough in which a cable or the like is housed.

As a transportation system used for electric power transportation, two types of structures are used: a conduit buried in the ground and a trough used on the side of a road or a railroad track. In the case of a conduit buried in the ground, once the cable is inserted into the conduit and laid, it is buried in the ground, so it is highly secure, but it is difficult to add and maintain cables, and the construction cost is also high. There is a problem that it is expensive. On the other hand, since the trough track has a structure in which the trough lid can be opened, it is easy to add cables in the trough and maintain and inspect it, and the construction cost is low.

The trough and trough lid are usually made of resin, but under normal usage conditions, the trough lid may be made of resin, but when a car crosses over the trough lid, the trough lid is large. Load resistance is required. Therefore, when a resin trough lid is used for applications that require load bearing capacity, it is necessary to make the trough lid extremely thick in order to satisfy the load bearing capacity.

Until now, when load bearing capacity is required, a lattice-shaped metal molded grating lid and a concrete trough have been used as trough lids. In the case of a concrete trough, there is a problem that it is difficult to form a complicated shape having a fitting portion, and since the grating lid does not have a connecting structure, a gap is likely to be formed between the grating lids, and the trough line has a problem. There was a problem that a gap was created at the bend.

As such a trough structure, a gutter having a drainage port having high drainage efficiency without hindering walking has been proposed (Patent Document 1). The gutter of Patent Document 1 has a gutter main body in which at least a part of the upper portion is opened and serves as a flow path, and a lid installed in the opening. The gutter body is provided with a means for determining the position of the lid with respect to a part of the gutter body, and when the lid is installed in the opening of the gutter body, the side surface of the lid and the opening side of the gutter body facing the lid are provided. The gutters form a first space for drainage with a vertically elongated cross section.

In Patent Document 1, laterally protruding protrusions are provided on the side surface of the lid installed at the opening of the gutter to form a linear drainage gap along the edge of the opening, which does not hinder walking. It is possible to construct a gutter that is as thin as possible, but with a drainage gap that extends long in the longitudinal direction of the gutter. Further, since it is not necessary to fill the drainage gap by grating or the like, it is possible to construct a gutter having high drainage efficiency at low cost. In the case of such a concrete trough, workability is poor, it is difficult to deal with curved parts, and there is a problem in security.

In addition, the opening, which is the mounting port for grating, is securely filled to ensure safety so that it will not come off even when the vehicle is running, and the drop into the opening of vehicles and pedestrians is eliminated. A packing body for a grating mounting port has been proposed, which can easily handle the case where the grating is removed for inspection or the like (Patent Document 2).

The packing material for a mounting port of Patent Document 2 is composed of a massive body having a plan view shape larger than a partial opening on the grating surface for installing and fixing the grating. The lump is formed of an elastic body such as natural rubber, and is further provided with a small hole for pulling out from the upper surface to the bottom surface. By press-fitting the mass into the mounting port, the mass is housed in the mounting port.

The grating lid of Patent Document 2 is arranged by press-fitting a lump body on the upper part of the mounting portion of the grating lid to enhance the security of the grating lid. However, the grating lid is directly attached to the concrete trough body. It does not disclose the structure for attaching the grating lid to the resin trough body.

Further, a water-permeable groove lid that replaces the cast iron lattice lid and the steel grating that have been widely used so far has been proposed (Patent Document 3). The permeable groove lid of Patent Document 3 is arranged in a gutter or a drainage port of a road or a park, and has a sufficient drainage function while having a strength corresponding to a load of a place of use. According to Patent Document 3, it is possible to provide a water-permeable landscape groove lid that has a good landscape and a feeling of walking, is lightweight, and is economically inexpensive.

More specifically, in Patent Document 3, a water-permeable resin mortar is paved on the upper surface of a steel frame via a steel plate having water-permeable holes or a punching metal, and the surface is smoothed and integrated. In addition, the upper edges of the four side plates of the steel frame are adjusted to be in the same horizontal plane as the surface of the paved permeable resin mortar. As described above, the water-permeable landscape groove lid of Patent Document 3 is formed of a granular aggregate and a synthetic resin binder on the upper surface of a steel frame surrounded by side plates on all sides via a steel plate or a punching metal having water-permeable holes. A permeable resin mortar consisting of a mixture is paved, the surface is smoothed, and it is formed as a unit.

Patent Document 3 discloses a water-permeable groove lid in which a steel plate having a water-permeable hole covered with a water-permeable resin mortar, a punching metal, or the like is arranged on the upper surface of a steel grating-shaped frame. A mounting member is arranged on the upper surface of the water-permeable groove lid, and the water-permeable resin mortar is fixed to the steel grating-shaped frame by bolts. However, Patent Document 3 does not disclose a fixing structure for the trough of this grating lid type permeable groove lid.

Further, since the shape of the lid provided in the U-shaped groove such as a gutter or a crossing groove of a road is triangular in a plan view, a grating lid that can be arranged with less rattling has been proposed (Patent Document 4). ..

The triangular-shaped grating lid made of cast iron of Patent Document 4 is provided with a hook-shaped engaging protrusion and a hook-shaped recess for receiving the engaging protrusion on the side where the adjacent groove lids are engaged with each other. By fitting the protruding portion and the concave portion to each other, the gutter can be stably and continuously closed without a gap. Patent Document 4 describes the arrangement relationship between adjacent triangular groove lids on the upper surface of the U-shaped groove. It does not disclose the fixed structure.

Further, a drainage outlet structure provided on the floor of a kitchen room such as a dining room, a restaurant, and a school lunch factory has been proposed (Patent Document 5). According to the drainage port structure of Patent Document 5, it is not necessary to provide an inclined plate by welding or the like so as to be located between the main bars adjacent to the grating groove lid, and the grating groove lid can be easily manufactured. Drainage can be performed on the receiving frame that receives both edges.

In the drainage port structure of Patent Document 5, a pair of elongated receiving frames having lower ends attached to the inner surface side of the trough are provided at the upper ends on both sides of the elongated trough along the length direction. The plate portion of the receiving frame that receives both side edges of the grating groove lid is inclined downward toward the trough. The lower ends of the main bar of the grating groove lid are notched so as to be inclined upward at substantially the same angle as the inclination angle of the plate portion of the receiving frame. The notch portion is placed on the inclined plate portion of the receiving frame and is configured to support the grating groove lid.

Patent Document 5 discloses a structure in which the grating groove lid is arranged on the upper surface of the trough, but the grating lid of Patent Document 5 has a structure supported from both sides by a receiving frame, and the load of the receiving frame is received by a mortar. be. Therefore, it is not a structure that receives the load of the grating groove lid by the trough. Further, Patent Document 5 is an application of a drainage port structure provided on the floor surface of a kitchen room, and is not a structure in consideration of the load bearing capacity of the grating groove lid.

Japanese Unexamined Patent Publication No. 2004-76304 Japanese Unexamined Patent Publication No. 2002-146897 Jikkenhei 5-030284 Gazette Japanese Unexamined Patent Publication No. 2006-266029 Japanese Patent Application Laid-Open No. 2003-253716

As described above, even if a resin trough body and a resin trough lid are used, there is no problem under normal usage conditions. However, when a heavy vehicle crosses the trough lid, the trough lid is required to have a large load bearing capacity. In order to use such a resin trough lid and satisfy the load bearing capacity, it is necessary to make the trough lid extremely thick. However, in order to design a new resin trough lid, it is necessary not only to make it thicker, but also to take into consideration the dispersion of stress applied to the resin lid. In addition, since the burial depth of the trough body becomes deep, there is a problem that the construction method has to be changed at the same time as the cost is high.

Conventionally, when such load bearing capacity is required, a lattice-shaped metal molded grating lid and a concrete trough have been used as trough lids. However, in the case of a concrete trough, there is a problem that it is not only heavy and difficult to handle, but also difficult to form into a complicated shape having a fitting portion.

The present invention has been made in view of such a problem, and by using a trough body made of resin instead of a concrete trough, a resin having excellent handleability and load bearing capacity while being lightweight. It is an object of the present invention to provide a structure for attaching a grating lid to a trough body made of a product, a trough line, a method for forming the trough line, and a grating lid.

In order to achieve the above-mentioned object, the first invention is a structure for attaching a grating lid to a trough body made of resin, and the trough body has a substantially U-shaped cross section having a bottom and both sides. Vertical ribs for reinforcement are formed at predetermined intervals on the outer surfaces of both side portions of the trough body having a predetermined length, and two vertical ribs are formed in the vicinity of the front and rear ends of the trough body. In the vicinity of the front and rear ends of the main body, horizontal ribs for mounting the L-shaped member are formed so as to connect the two vertical ribs, and between the vertical ribs at the tip of the trough body and the vertical ribs at the rear end. , A predetermined number of the vertical ribs are arranged at equal intervals, and other horizontal ribs are formed so as to connect the vertical ribs at the lowermost portion of the side portion of the trough body, and the fixing bracket mounting portion of the horizontal ribs is formed. An L-shaped member is arranged so as to face the horizontal plane of a steel material having an L-shaped cross section and cover the top of the side portion of the trough body, and the L-shaped member is bolted to a fixing bracket attached to the horizontal rib. By being fixed, a storage space for accommodating the grating lid is formed, the grating lid is accommodated in the accommodation space, and the grating is placed in a bolt fixing portion which is a mounting hole formed on a horizontal surface of the L-shaped member. It is a structure for attaching a grating lid to a trough body, which is characterized by fixing the lid. The number of vertical ribs can be appropriately determined in consideration of the width and thickness of the vertical ribs as long as the load bearing capacity of the trough can be improved and the load of the grating lid can be supported. For example, 5 It can be a book.

The grating lid is formed by a large number of flat steel plates passed inside a substantially rectangular frame so as to connect the long sides parallel to the short side at equal intervals, and the short sides parallel to the long side. It has a grating structure in which a large number of lattices are formed by rod-shaped steel materials passed to the upper surface of the lid so as to be connected at equal intervals to both sides in the width direction in the vicinity of the front end portion and the rear end portion of the lattice. A steel plate with mounting holes having mounting holes is welded to two predetermined positions that are substantially symmetrical and do not interfere with the lattice, to form a bolt fixing portion of the grating lid, and the grating lid is formed. On the outer surface on one short side of the frame body, an L-shaped flange member bent in an L-shape forms a tongue-shaped protrusion having a length corresponding to a connection portion between the trough bodies. It is desirable that it is fixed. It is desirable that the L-shaped flange member is fixed to the outer surface on one short side of the frame of the grating lid by welding.

A U-shaped cross-section fixing bracket is provided at the fixing bracket mounting portion of the horizontal rib, the fixing bracket and the L-shaped member are fixed by a nut and a mounting bolt, and the grating lid is attached to the L-shaped member. By fixing, the grating lid may be attached to the trough body via the L-shaped member.

When the L-shaped member is attached to the fixing bracket mounting portion of the trough body via the fixing bracket, the L is inside the cross section of the trough body from the tips of both side portions of the trough body. Another mounting hole provided in the character member and the steel plate with a mounting hole of the grating lid formed by welding on the back surface of the grating lid are arranged so that the positions of the holes match each other. By fixing the steel plate with mounting holes and the L-shaped member, the grating lid may be bolted to the trough body.

At least one aggregate of ceramic or natural stone may be solidified and filled with an adhesive resin of either epoxy resin or urethane resin, or mortar may be filled inside the lattice of the grating lid. ..

A resin trough lid may be directly fixed to the fixing bracket mounting portion of the horizontal rib instead of mounting the L-shaped member for accommodating the grating lid.

According to the first invention, by fixing the grating lid to the resin trough body, the required load bearing capacity can be satisfied even if the vehicle crosses the trough lid, and the resin trough body can be satisfied. Because it uses, it is also excellent in handleability. As described above, the structure for attaching the grating lid to the trough of the present invention is a simple structure in which the grating lid can be attached to the trough body and secures the load bearing capacity when the vehicle crosses the grating lid.

Further, by attaching the L-shaped member to the horizontal ribs on the outer surfaces of both sides of the trough body, the lateral load when the vehicle runs on the grating lid is composed of the horizontal ribs and the vertical ribs on the side parts of the trough body. It can be received with a rib structure. At this time, the vertical load can be directly received at the upper end portion of the trough side portion, and the load receiving portion of the vehicle can be distributed to the rib structure and the side portion. At this time, since the vertical rib reinforces the side portion and prevents the side portion from being deformed, it secondarily supports the vertical load.

Further, by providing an L-shaped collar member bent in an L shape on the outer surface on one short side of the frame of the grating lid, this L-shaped collar member can be formed into a connecting structure between the grating lids. .. Therefore, even if the trough line has a curved portion, the upper part of the space created by the trough line can be completely closed by the grating lid.

Further, the L-shaped flange member of the grating lid enters under the adjacent grating lid. That is, the adjacent grating lid is placed on a part of the grating lid. Therefore, even if an attempt is made to open the grating lid, it cannot be opened by the adjacent grating lid, so that the theft of the cable laid in the trough main body is suppressed. As described above, the L-shaped flange member provides excellent security against damage caused by theft of the cable in the trough body or dropping of a foreign object.

Further, by fixing the fixing bracket to the horizontal rib, the L-shaped member can be easily fixed to the trough main body.

Further, another mounting hole provided in the L-shaped member and a steel plate with a mounting hole formed by welding on the back surface of the grating lid are arranged so that the positions of the holes match each other. The grating lid can be easily bolted to the trough body.

Further, if at least one aggregate of ceramic or natural stone is solidified and filled with an adhesive resin of either epoxy resin or urethane resin, or mortar is filled inside the lattice of the grating lid. Since the grid can be closed, the security against damage to the cable due to the fall of foreign matter into the trough body is excellent.

Further, instead of attaching the L-shaped member to the fixing bracket mounting portion, the conventional fixing structure can be obtained by directly fixing the resin trough lid.

The second invention is a structure for attaching a grazing lid to a trough body made of resin, wherein the trough body has a substantially U-shaped cross-sectional shape having a bottom portion and both side portions, and has a predetermined length. One end and the other end of the trough body are provided with a male fitting portion and a female fitting portion that can be fitted, respectively, and the male fitting portion has a reduced diameter in cross section. A diameter-expanded portion whose cross section is bent outward is formed at the tip of the diameter portion and the diameter-reduced portion, and the female fitting portion has a cross section so as to accommodate the male fitting portion. An expanded diameter portion and a reduced diameter portion with a reduced cross section are formed at the tip of the expanded diameter portion, and vertical ribs for reinforcement are formed at predetermined intervals on the outer surfaces of both side portions of the trough body having a predetermined length. Is formed, and two vertical ribs are formed in the vicinity of the front and rear ends of the trough body, and two horizontal ribs for mounting the L-shaped member are formed in the vicinity of the front and rear ends of the trough body so as to connect the two vertical ribs. Is formed, and a predetermined number of the vertical ribs are arranged at equal intervals between the vertical ribs at the tip of the trough body and the vertical ribs at the rear end, and further, the lowermost portion of the side portion of the trough body. In, other horizontal ribs are formed so as to connect the vertical ribs, and the horizontal surface of the steel material having an L-shaped cross section faces the fixing bracket mounting portion of the horizontal ribs so as to cover the top of the side portion of the trough body. An L-shaped member is arranged in the accommodation space, and the L-shaped member is bolted to a fixing bracket attached to the lateral rib to form an accommodation space in which the graching lid is accommodated. It is a structure for attaching a glazing lid to a trough body, which comprises fixing the glazing lid to a bolt fixing portion which is a mounting hole formed in a horizontal plane of the L-shaped member in which the lid is accommodated. Here, the number of vertical ribs can be appropriately determined in consideration of the width and thickness of the vertical ribs as described above, but can be, for example, five.

The grating lid has a grating structure in which a large number of grids are formed inside a substantially rectangular frame, and the grating lids are placed at predetermined positions near the front end portion and the rear end portion of the grid. A steel plate with mounting holes in which a part of the lattice is cut out and a mounting hole is formed is welded to the notch portion of the lattice to form a bolt fixing portion of the grating lid, and the frame of the grating lid is formed. An L-shaped flange member bent in an L-shape is fixed to the outer surface on one short side so as to form a tongue-shaped protrusion having a length corresponding to the connection portion between the trough bodies. Is desirable. It is desirable that the L-shaped flange member is fixed to the outer surface on one short side of the frame of the grating lid by welding.

A fixing bracket having a U-shaped cross section is provided at the fixing bracket mounting portion of the horizontal rib, the fixing bracket and the L-shaped member are fixed with bolts, and the grating lid is fixed to the L-shaped member. Then, the grating lid may be attached to the trough body via the L-shaped member.

Inside the cross section of the trough body from the tips of both sides of the trough body, a mounting hole provided in the L-shaped member and a part of the lattice of the grating lid are cut out to form a steel plate with mounting holes. The grating lid may be bolted to the trough body by bolting the bolt fixing portion of the grating lid formed by welding to the notch portion of the lattice.

Even if at least one aggregate of ceramic or natural stone is solidified and filled with an adhesive resin of either epoxy resin or urethane resin, or mortar is filled inside the lattice of the grating lid. good.

A steel plate having a satin-like surface or a non-slip processed steel plate may be welded to the upper surface of the grating lid.

A resin trough lid may be directly fixed to the fixing bracket mounting portion of the horizontal rib instead of mounting the L-shaped member for accommodating the grating lid.

According to the second invention, the same effect as that of the first invention can be obtained. Further, by forming the male fitting portion and the female fitting portion on both sides of the trough main body, the trough main bodies can be easily connected to each other.

Further, the upper surface of the grating lid is welded with a steel plate having a satin-like surface or a non-slip processed steel plate, so that the upper surface can be used as a non-slip material when walking on the upper surface.

The third invention has a structure for attaching a grating lid to a trough main body according to the second invention, and is characterized in that the trough main body and the grating lid are repeatedly connected to each other in large numbers. It is a railroad track.

At least a part of the trough track may have a bend. Since troughs are usually installed on the sides of various roads, actual trough tracks often have bends.

Further, the trough main body and the grating lids are repeatedly connected to each other to form a trough line, and the grating lid having no L-shaped flange member is formed at a part of the straight portion of the trough line at predetermined intervals. It may be crowned. By doing so, the grating lid does not overlap with the L-shaped flange member of the grating lid, so that the grating lid can be easily removed.

In a part of the trough line, instead of attaching the grating lid, a plurality of resin trough lids are continuously connected and directly fixed to the fixing bracket mounting portion of the lateral rib, whereby the grating lid is covered. The drawn line and the trough line covered with the resin trough lid may be continuously formed.

According to the third invention, the trough main bodies are fitted and connected to each other by the male fitting portion and the female fitting portion, and the trough main body is covered with the grating lid, whereby the grating lid is covered. It is possible to obtain a trough line in which the mounting structure to the trough body is continuously constructed.

Further, if it is a straight section, the mounting structure may be formed by continuously contacting each other, but the trough line usually has a curved portion. At this time, a male fitting portion and a female fitting portion are formed at the front and rear ends of the trough body, and a fitting allowance is provided at the connecting portion between the male fitting portion and the female fitting portion. It can correspond to the line having.

Further, even when such a bent portion is formed, by providing an L-shaped flange member at the end of the grating lid as a connecting mechanism of the grating lid, the grating lids arranged adjacent to each other in the trough line are provided with each other. It is possible to prevent gaps.

Further, by not providing the L-shaped flange member on a part of the grating lid of the trough line, the grating lid can be easily opened and closed. Therefore, by using a grating lid having no L-shaped flange member at predetermined intervals, it is possible to improve the maintainability inside the trough body.

Further, in the trough mounting structure in which the grating lid is attached as the trough lid and the trough mounting structure in which the resin trough lid is used, the mounting positions of the trough lids in the trough main body are formed at the same position. Further, since the width and height of each trough lid are formed to be substantially the same, both the grating lid and the resin trough lid can be attached to the same trough body. Therefore, in the trough track, it is possible to use the grating lid and the resin trough lid properly.

In this way, instead of attaching the grating lid to a part of the trough line, by fixing the resin trough lid to the trough body, a partially highly load-bearing grating lid is used, and the other parts are covered. , A lightweight resin trough lid can be used. Specifically, a grating lid was used for a part requiring a high load such as T25, and a resin trough lid was used for a part where only a load load of a normal pedestrian walking level could be considered. A continuous trough line can be formed.

As described above, in the trough line, the section where the load bearing capacity is required is a part. For this reason, by fixing the grating lid in the section where load bearing capacity is required and using the same resin trough lid as in the past in the section where load bearing capacity is not required, installation workability is also improved. An excellent trough track can be obtained.

A fourth aspect of the invention is a method for forming a trough line using a structure for attaching a grating lid to a trough body according to a second aspect, wherein the male fitting portion of one of the trough bodies is fitted to the other. It is fitted and connected to the female fitting portion of the trough body, and one of the grating lids is placed on the L-shaped flange member of the other grating lid by using two grating lids. By placing the grating lids, and further connecting the male fitting portion and the female fitting portion of the trough main body, the grating lid and the trough main body are repeatedly connected in large numbers. It is a method of forming a trough line, which is characterized by forming a line.

It is desirable that the direction of the male fitting portion of the trough body and the direction of the L-shaped flange member of the grating lid are opposite to each other.

According to the fourth invention, an L-shaped flange member is arranged at one end of the grating lid as a connecting mechanism, and the end portion where the L-shaped flange member of the grating lid is not arranged is the L of the adjacent grating lid. By placing it on the character flange member, a trough line can be formed.

At this time, by arranging the direction of the male fitting portion of the trough body and the direction of the L-shaped flange member of the grating lid in opposite directions, the installation direction of the trough body and the installation direction of the grating lid are the same. Therefore, the trough body and the grating lid can be installed at the same time.

A fifth invention is a grating lid, wherein the grating lid has a structure in which a large number of lattices are formed inside a substantially rectangular frame, and the vicinity of the front end portion and the vicinity of the rear end portion of the grating lid. A part of the grating of the grating lid is cut out in the lattice, and a steel plate with a mounting hole is welded to the notch portion of the grating to form a bolt fixing portion of the grating lid, and the grating lid is formed. The feature is that an L-shaped flange member bent into an L-shape is fixed to one side in the longitudinal direction so as to form a tongue-shaped protrusion having a length corresponding to the connection portion of the trough body. It is a grating lid. It is desirable that the L-shaped flange member is fixed to one short side end of the frame of the grating lid in the longitudinal direction by welding.

The inside of the lattice may be solidified and filled with at least one aggregate of ceramic or natural stone with an adhesive resin of either epoxy resin or urethane resin, or may be filled with mortar.

An LED light source placed on a substrate is arranged inside at least a part of the lattice, and the LED light source is fixed by an epoxy resin or a urethane resin filled in the lattice, and further, the substrate. May be arranged on the back surface of the grating lid, or may be arranged on the upper surface of the L-shaped member.

According to the fifth invention, by providing an L-shaped collar member bent into an L-shape on the outer surface on one short side of the frame of the grating lid, the cable in the trough body is provided by the L-shaped collar member. It is possible to improve the security against damage caused by theft or dropping of foreign matter. In the present application, security includes damage caused by theft of a cable or dropping of a foreign substance, as well as burning of a cable due to falling of a combustible material.

Further, if at least one aggregate of ceramic or natural stone is solidified and filled with an adhesive resin of either epoxy resin or urethane resin, or mortar is filled inside the lattice of the grating lid. You can block the grid.

Further, by arranging the LED light source on the grating lid, decorativeness can be imparted.

According to the present invention, by using a resin trough body instead of a concrete trough, the weight is reduced, and the grating lid is attached to the resin trough body, which has excellent handleability and load bearing capacity. A structure, a trough line, a method for forming a trough line, and a grating lid can be provided.

The above-mentioned structure for attaching the grating lid to the resin trough body of the present invention is a simple structure, and the grating lid can be attached to the trough body. Further, when the automobile crosses the grating lid and the grating lid is attached to the trough body made of resin, the load bearing capacity of the trough body and the grating lid is ensured.

Furthermore, since the grating lid can form a connecting structure that can block the upper part of the trough body made of resin, even if the trough line has a bend, the upper part of the space created by the trough line is completely closed by the grating lid. Will be done. Therefore, it is possible to realize a trough line having excellent security against theft of the cable in the trough body, damage due to the fall of foreign matter, and combustion of the cable due to the fall of combustibles.

The exploded perspective view which shows the attachment structure 1 of the grating lid to the trough main body. A partially enlarged view of the grid 29 of the grating lid 5. (A) is an enlarged plan view of the vicinity of the bolt fixing portion 33 of the grating lid 5, and (b) is a sectional view taken along line AA of (a). (A) and (b) are diagrams showing a process of attaching a grating lid to a trough body. The assembly perspective view which shows the attachment structure 1 of the grating lid to the trough main body. (A) to (c) are diagrams showing a method of forming a trough line 50. It is an enlarged view of the vicinity of the fitting portion between the trough main bodies 3, in which (a) shows a straight portion and (b) shows a bent portion. It is an enlarged view of the vicinity of the connecting portion between the grating lids 5, in which (a) shows a straight portion and (b) shows a bent portion. (A) and (b) are diagrams showing the maintenance method of the trough line 50. The figure which shows the attachment structure 1a of the resin trough lid 6 to the trough main body. FIG. 3 is a cross-sectional view showing a grating lid 5a. FIG. 2 is a cross-sectional view showing a grating lid 5b. (A) is a diagram showing a test method of a structure for attaching a grating lid to a trough body, and (b) is a sectional view taken along line BB of (a). (A) is a diagram showing the contact area of the tire, (b) is a diagram showing the load when the vehicle passes in the C direction of FIG. 13 (a), and (c) is a diagram showing the D direction of FIG. 13 (a). The figure which shows the load when a vehicle passes by. The figure which shows the measuring method of the displacement of a trough main body 3 and a grating lid 5.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing a structure 1 for attaching a grating lid to a trough body according to the present invention.

The structure 1 for attaching the grating lid to the trough main body mainly includes a trough main body 3, a grating lid 5, an L-shaped member 23, and the like. The trough body 3 is made of resin, for example, and is molded by press molding or injection molding. The trough body 3 has a substantially U-shaped cross-sectional shape having a bottom portion 9 and side portions 7 on both sides.

Reinforcing vertical ribs 11 are formed at predetermined intervals on the outer surfaces of the side portions 7 on both sides of the trough main body 3 having a predetermined length. More specifically, two vertical ribs 11 are formed in the vicinity of the front and rear ends of the trough body 3, and are predetermined at equal intervals between the vertical ribs 11 at the tip of the trough body 3 and the vertical ribs 11 at the rear end. The number of vertical ribs 11 (five in the figure) is arranged. Further, in the vicinity of the front and rear ends of the trough body 3, a horizontal rib 13 for attaching an L-shaped member, which will be described later, is formed so as to connect the two vertical ribs 11. Further, another horizontal rib 13a is formed so as to connect the vertical rib 11 at the lowermost portion of the side portion 7. A fixing bracket 19 having a U-shaped cross section is provided on the fixing bracket mounting portion 21 of the horizontal rib 13. The structure of the fixing bracket 19 will be described later.

Here, as for the vertical ribs of the female fitting portion 15 near the end of the trough main body 3, the bent portion of the female portion may also serve as the vertical ribs, or two vertical ribs may be independently provided. .. Needless to say, in the case of the trough main body 3 having no fitting portion, it is necessary to independently have two vertical ribs at the front and rear ends as described above.

A male fitting portion 17 and a female fitting portion 15 that can be fitted are provided at one end and the other end of the trough body 3 having a predetermined length, respectively. By fitting the male fitting portion 17 and the female fitting portion 15 of the adjacent trough main bodies 3, a plurality of trough main bodies 3 can be connected to each other. The detailed structure of the male fitting portion 17 and the female fitting portion 15 will be described later. Further, in the present embodiment, an example in which a male fitting portion 17 and a female fitting portion 15 are formed at each end of the trough main body 3 will be described, but these fitting portions are not essential. When a trough line is formed by using a trough body 3 having no fitting portions at both ends, the ends of the trough body 3 may be arranged so as to abut against each other.

The grating lid 5 is configured by forming a grid 29 inside a substantially rectangular frame 27 made of metal. Further, the inside of the grid 29 of the grating lid 5 is filled with the filler 39. The filler 39 is, for example, one in which at least one aggregate of ceramic or natural stone is solidified and filled with an adhesive resin of either an epoxy resin or a urethane resin, or filled with mortar.

FIG. 2 is a partially enlarged perspective view of the lattice 29 of the grating lid 5 through which the filler 39 is seen through. The lattice 29 has a large number of flat steel plates 29a passed so as to connect the long sides in parallel in the short side direction at equal intervals, and the upper surface of the lid so as to connect the short sides in parallel in the long side direction at equal intervals. It is formed by the rod-shaped steel material 29b passed to. As described above, the grating lid 5 has a grating structure in which a large number of lattices 29 are formed.

FIG. 3 shows a bolt fixing portion of the grating lid 5. A bolt fixing portion 33 of the grating lid 5 is formed in each of the vicinity of the front end portion and the vicinity of the rear end portion of the lattice 29. 3A is an enlarged plan view of the vicinity of the bolt fixing portion 33, and FIG. 3B is a sectional view taken along line AA of FIG. 3A.

The bolt fixing portion 33 is formed by welding a steel plate 35 with a mounting hole into which a mounting hole 37 is formed to a grid 29. The bolt fixing portions 33 are formed at two predetermined positions substantially symmetrical on both sides of the grating lid 5 in the width direction at the front and rear ends of the grating lid 5 and at positions that do not interfere with the grid 29.

More specifically, a mounting hole in which a part of the grating 29 of the grating lid 5 is cut out at predetermined positions near the front end portion and the rear end portion of the grating lid 5 to form a mounting hole 37. The attached steel plate 35 is welded to the notch portion of the grid 29 to form the bolt fixing portion 33 of the grating lid 5. The arrangement, shape, and size of the grid 29 and the steel plate 35 with mounting holes are not limited to the illustrated examples.

An L-shaped flange member 31 made of steel bent into an L-shape is welded to the outer surface of one of the short sides of the frame 27 of the grating lid 5. The L-shaped flange member 31 is fixed so as to form a tongue piece-shaped protrusion having a length corresponding to a connection portion between the trough main bodies 3. The function of the L-shaped collar member 31 will be described in detail later.

FIG. 4 is a diagram showing a process of attaching the grating lid 5 to the trough main body 3, and FIG. 5 is an assembly perspective view showing the attachment structure 1 of the grating lid to the trough main body 3. A steel L-shaped member 23 having an L-shaped cross section is arranged on the fixing bracket mounting portion 21 of the horizontal rib 13 via the fixing bracket 19. The pair of L-shaped members 23 are arranged so as to face the horizontal plane with respect to the horizontal rib 13 and cover the top of the side portion 7 of the trough body 3.

Further, as described above, the fixing bracket mounting portion 21 of the horizontal rib 13 is provided with the fixing bracket 19 having a U-shaped cross section. A bolt 45 is inserted into the mounting hole 25a of the L-shaped member 23. A nut 47 is fixed to the lower portion of the fixing bracket 19 by welding or caulking. The fixing bracket 19 and the L-shaped member 23 are fixed by the nut 47 and the mounting bolt 45.

The nut 47 provided at the bottom of the fixing bracket 19 may be a cap nut. Further, instead of the nut 47, a mounting bolt may be welded to the lower portion of the fixing bracket 19. When the cap nut is arranged, it is fixed by the bolt 45 from the upper part, and when the mounting bolt is welded, it is fixed by the nut from the upper part.

In a state where the L-shaped member 23 is attached to the fixing bracket mounting portion 21 (horizontal rib 13) of the trough main body 3 via the fixing bracket 19, the mounting hole 25b provided in the L-shaped member 23 is the trough main body 3. It is located inside the cross section of the trough body 3 with respect to the tips (tops) of the side portions 7 on both sides. A part of the grid 29 is cut out at each of the other mounting holes 25b provided in the L-shaped member 23 and symmetrical positions in the short side direction of the grating lid 5, and welded to the back surface of the cutout portion of the grid 29. The mounting holes 37 of the steel plate 35 with mounting holes for the grating lid 5 are arranged so that the positions of the holes coincide with each other.

A bolt 41 is inserted into a mounting hole 25b of the L-shaped member 23 and a mounting hole 37 of the grating lid 5 and fixed by a nut 43. By fixing the steel plate 35 with mounting holes and the L-shaped member 23 and fixing the grating lid 5 to the L-shaped member 23 in this way, the grating lid 5 is attached to the trough body 3 via the L-shaped member 23 with bolts. Be done.

As described above, the pair of L-shaped members 23 are bolted to the fixing metal fittings 19 attached to the lateral ribs 13 to form an accommodation space in which the grating lid 5 is accommodated. The grating lid 5 is accommodated in this accommodation space, and by fixing the grating lid 5 to a bolt fixing portion which is a mounting hole 25b formed on the horizontal surface of the L-shaped member 23, the grating lid 5 is provided via the L-shaped member 23. It is bolted to the trough body 3. Here, instead of directly fixing the grating lid 5 to the side portion 7 of the trough main body 3, by fixing the grating lid 5 in two stages via the L-shaped member 23, conversely complicated fixing is performed when the grating lid 5 is directly fixed to the side portion 7. It is possible to avoid becoming a structure.

Next, a method of forming a trough line using the attachment structure 1 of the grating lid to the trough main body will be described. 6 (a) to 6 (c) are views showing a method of forming the trough line 50, and FIG. 6 (a) shows a new trough main body on the right side of the previously installed left trough main body 3. It is a figure which shows the state which 3 are connected. Further, FIG. 7A is a plan view showing a state in which the male fitting portion 17 and the female fitting portion 15 of the adjacent trough main bodies 3 are fitted (the L-shaped member 23 and the like are not shown). be. The trough line 50 has a structure 1 for attaching a grating lid to the trough main body, and is formed by repeatedly connecting a large number of the trough main body 3 and the grating lid 5 to each other.

As described above, the female fitting portion 15 and the male fitting portion 17 are provided at both ends of the trough main body 3 in the longitudinal direction, respectively. As shown in FIG. 7A, the male fitting portion 17 has a reduced diameter portion 55 having a reduced cross section and an enlarged diameter portion 53 whose cross section is bent outward at the tip of the reduced diameter portion 55. Is formed. Further, the female fitting portion 15 has an enlarged diameter portion 49 having an enlarged cross section and a reduced diameter portion 51 having a reduced cross section at the tip of the enlarged diameter portion 49 so that the male fitting portion 17 can be accommodated. Is formed.

To form a trough line, first, the enlarged diameter portion 53 of the male fitting portion 17 of one trough main body 3 is inserted from above the enlarged diameter portion 49 of the female fitting portion 15 of the other trough main body 3. By doing so, both are fitted and the trough main bodies 3 are connected to each other. At this time, there is a clearance in the width direction and the length direction between the male fitting portion 17 and the female fitting portion 15. Therefore, as shown in FIG. 7B, the trough main body 3 can be bent and connected. Therefore, the trough line 50 can form a curved portion at least in a part thereof.

Next, as shown in FIGS. 6 (b) and 6 (c), the grating lid 5 is installed above the trough main body 3. At this time, the end portion of the newly installed grating lid 5 (the end portion on the side where the L-shaped flange member 31 is not arranged) is placed on the L-shaped flange member 31 of the grating lid 5 previously installed. By placing it, the grating lid 5 is installed.

FIG. 8A is an enlarged plan view of the vicinity of the connecting portion between the grating lids 5, and is a diagram showing a state in which the grating lid 5 is placed on the trough main body 3 of FIG. 7A. As described above, the L-shaped flange member 31 is grating so as to form a tongue piece-shaped protrusion having a length corresponding to the connection portion between the trough main bodies 3 (for example, the length of the female fitting portion 15). It is welded to the lid 5. Therefore, when the grating lid 5 is placed on the trough main body 3, the L-shaped collar member is above the connection portion between the trough main bodies 3 (the fitting portion between the male fitting portion 17 and the female fitting portion 15). 31 is arranged. Therefore, even if a gap is formed between the grating lids 5, it is possible to prevent foreign matter and the like from entering the inside of the trough body 3.

FIG. 8 (b) is an enlarged plan view of the vicinity of the connecting portion between the grating lids 5, and is a diagram showing a state in which the grating lid 5 is placed on the trough main body 3 of FIG. 7 (b). As shown in the figure, even at the bent portion of the trough line, the grating lids 5 are connected to each other at an angle, and the L-shaped flange member 31 suppresses the formation of a gap.

In this way, the male fitting portion 17 of one trough main body 3 can be fitted and connected to the female fitting portion 15 of the other adjacent trough main body 3. Further, using two grating lids 5, the grating lid 5 can be connected by placing one of the grating lids 5 on the L-shaped flange member 31 of the other grating lid 5. Further, by connecting the male fitting portion 17 and the female fitting portion 15 of the trough main body 3, it is possible to form a trough line 50 in which a large number of grating lids 5 and the trough main body 3 are repeatedly connected to each other. ..

Here, the direction of the male fitting portion 17 of the trough main body 3 and the direction of the L-shaped flange member 31 of the grating lid 5 are arranged so as to be opposite to each other. In the examples shown in FIGS. 6 (a) to 6 (c), the male fitting portion 17 of the trough body 3 is arranged so as to face left in the figure, and the L-shaped flange member 31 of the grating lid 5 is shown in FIG. Arranged so that it faces the middle right side.

As described above, the trough main body 3 is fitted by inserting the male fitting portion 17 from above the female fitting portion 15. Therefore, in the illustrated example, the trough main body 3 is arranged in order in the direction in which the female fitting portion 15 is arranged (from the left side to the right side in the figure). On the other hand, in the grating lid 5, the grating lid 5 to be installed next is placed on the upper portion of the L-shaped flange member 31 installed earlier. Therefore, the grating lids 5 are arranged in order from the left side to the right side in the drawing in the direction in which the L-shaped flange member 31 is arranged.

Therefore, for example, when 100 troughs are connected to form a trough line, if the direction of the male fitting portion 17 of the trough body 3 and the direction of the L-shaped flange member 31 of the grating lid 5 match, 100 After arranging the trough main bodies 3 of the books, it is necessary to put the grating lid 5 on the trough main body 3 placed last and arrange the grating lids 5 in sequence. On the other hand, if the direction of the male fitting portion 17 and the direction of the L-shaped flange member 31 of the grating lid 5 are opposite to each other, the installation direction of the trough main body 3 and the installation direction of the grating lid 5 are the same. , The trough body 3 and the grating lid 5 can be installed at the same time.

Further, since all the grating lids 5 except the end portion of the trough line 50 have other grating lids 5 adjacent to each other above the L-shaped flange member 31 of the trough line 50, the grating lid 5 is easily removed. Is difficult. Therefore, it is possible to prevent the grating lid 5 from being opened, and as a result, it is possible to suppress the theft of internal cables and the like.

In the trough line 50, a grating lid 5 having no L-shaped flange member 31 may be covered with a part of the straight portion of the trough line 50 at predetermined intervals. In FIG. 9A, the central grating lid 5 does not have the L-shaped flange member 31. By doing so, as shown in FIG. 9B, the grating lid 5 can be easily opened by itself. Therefore, maintenance and the like inside the trough main body 3 can be easily performed.

As described above, according to the present embodiment, the grating lid 5 can be attached to the upper part of the resin trough main body 3, so that the required load capacity can be secured. At this time, by attaching the L-shaped member 23 to the lateral rib 13 on the outer surface of the side portion 7 of the trough main body 3, the lateral load when the vehicle travels on the grating lid 5 is applied to the lateral rib of the trough main body 3. It can be received by the rib structure of 13 and the vertical rib 11. Further, the vertical load can be directly received by the upper end portion of the side portion 7 of the trough body 3. Therefore, the load receiving portion of the vehicle can be distributed to the rib structure and the side portion.

The lateral load is received by the lateral rib 13, and the load received by the lateral rib 13 is also distributed to the vertical ribs 11 on both sides as a lateral load. Further, since the trough main body 3 is buried in the ground and used, the lateral load received by the trough main body 3 is dispersed in the earth and sand on both sides. Here, the vertical load is received by the vertical ribs 11, but the vertical load is received not only by the vertical ribs 11 sandwiching the horizontal ribs 13 but also by the five vertical ribs 11 between the vertical ribs 11 at the front and rear ends of the trough body 3. It will be. As described above, the horizontal rib 13 has two roles, that is, a role as a mounting portion for the L-shaped member 23 and a role as a reinforcing structure, and further, the side portion 7 of the trough body 3 is formed by the vertical rib 11. Since it is reinforced, it does not buckle.

Further, since the L-shaped member 23 is not directly attached to the side portion 7 of the trough main body 3, it is not necessary to process the side portion 7 of the trough main body 3. As described above, since it is not necessary to machine the trough body 3 at all, it is possible to prevent stress concentration due to machining or scratches on the trough body 3. This makes it possible to increase the load bearing capacity of the trough body 3.

Further, instead of directly attaching the grating lid 5 to the trough main body 3, the L-shaped member 23, which is a receiving member, is attached, and the attachment portion with the L-shaped member 23 and the attachment portion with the grating lid 5 are separated, so that each can be simplified. It can be installed in a flexible structure.

Further, by joining the L-shaped flange member 31 to the grating lid 5, it is possible to eliminate the gap generated between the grating lids 5. Further, by arranging the grating lid 5 on the adjacent L-shaped flange member 31, the grating lid 5 cannot be easily opened. At the same time, since the upper part of the trough main body 3 can be closed by the grating lid 5, the airtightness of the trough line can be improved, and damage prevention and fire resistance of the cable arranged inside the trough main body 3 can be improved. In addition, security such as theft prevention can be enhanced.

Instead of attaching the L-shaped member 23 for accommodating the grating lid 5 to the fixing bracket mounting portion 21 of the horizontal rib 13, a resin trough lid may be directly fixed. FIG. 10 is a cross-sectional view showing a structure 1a for attaching the grating lid to the trough body. For example, the strength classification of T-25 defined by the Road Bridge Specification (issued by Nippon Road Association) and the Gross Vehicle Restriction Ordinance is that the total body weight is 25t, the maximum load per wheel is 50kN, and the impact coefficient is 0.4 (live load: 70kN), tire contact area: 200mm x 500mm.

Since such a section requiring load bearing capacity is a part of the trough track section, the grating lid 5 is fixed in the section requiring load bearing capacity, and the load bearing capacity is not required. In the section, the same resin trough lid 6 as the conventional one can be used.

In this way, instead of attaching the grating lid 5 to a part of the trough line 50, a plurality of resin trough lids 6 are continuously connected and directly fixed to the fixing bracket mounting portion 21 of the horizontal rib 13. , The trough line covered with the grating lid 5 and the trough line covered with the resin trough lid 6 are continuously formed, and a trough line having appropriate load bearing performance can be obtained depending on the portion. At this time, since the resin trough lid 6 does not require a special load bearing capacity, the thickness of the resin trough lid 6 can be made substantially the same as that of the grating lid 5, and the top of the trough lid can be covered. It is possible to ensure walking safety when walking.

Further, instead of the grating lid 5, the grating lid 5a shown in FIG. 11 may be used. The grating lid 5a has substantially the same configuration as the grating lid 5, except that the steel plate 63 is welded to the upper surface of the grating lid 5. The surface of the steel sheet 63 is formed in a satin finish or is subjected to anti-slip processing.

The steel plate 63 is welded to, for example, the frame body 27, and a hole is formed in a portion corresponding to the bolt fixing portion 33. In this way, by providing the steel plate having a satin finish or a non-slip finish on the surface, it is possible to suppress the slipping of a pedestrian walking on the trough track.

Further, instead of the grating lid 5, the grating lid 5b shown in FIG. 12 may be used. The grating lid 5b has substantially the same configuration as the grating lid 5, except that the LED light source 59 is arranged in a part of the grating lid 5.

The substrate 57 is arranged on a part of the back surface of the grating lid 5b. An LED light source 59 is placed on the substrate 57. The LED light source 59 is arranged inside at least a part of the grid 29. Further, the LED light source 59 is fixed by the epoxy resin 61 filled in the grid 29. A urethane resin may be used instead of the epoxy resin.

The LED light source 59 is arranged near one end of the grating lid 5b in the width direction. Further, the LED light source 59 is arranged at a plurality of positions in a predetermined length range along the longitudinal direction of the grating lid 5b, avoiding the bolt fixing portion 33.

By arranging the LED light source 59 in a part of the grating lid 5b in this way, it is possible to impart decorativeness to the trough line 50. In the same trough line 50, the grating lids 5, 5a, and 5b may be used properly depending on the part.

The load bearing capacity was evaluated for the mounting structure of the grating lid using the steel material having an L-shaped cross section on the trough body described above. As the grating lid, a lid having a thickness of 32 mm, a weight of 32 kg / m (with a decorative lid containing all aggregates), and a strength design category of T-25 was used. For comparison, a reinforced concrete lid having a thickness of 70 mm and a weight of 48 kg / m and a strength design category of T-25 was used. If the L-shaped member is made of aluminum, for example, other than steel, the strength is insufficient. Further, if the grating lid main body and the L-shaped member are made of dissimilar metals, there is a problem of electrochemical corrosion. Therefore, the L-shaped member needs to be made of steel.

13 (a) is a diagram showing a load-bearing resistance evaluation method of a structure for attaching a grating lid to a trough main body, and FIG. 13 (b) is a sectional view taken along line BB of FIG. 13 (a). A trough track was buried in a straight line in the ground. The outer width of the grating lid 5 was 280 mm, the inner width was 200 mm, and the total height of the trough main body 3 and the grating lid 5 was 306 mm. The ground is composed of asphalt 64 (thickness 50 mm), soil 65 (thickness 201 mm), and crushed stone 67 (thickness 175 mm) in order from the surface. Width 480 mm) was arranged.

The vehicle used for the test had two wheels x 1 axle for the front wheels and 4 wheels x 2 axles for the rear wheels, and had a total weight of 24.97 tons. FIG. 14A is a diagram showing the ground contact area of the tire on the rear wheels, and the ground contact area of the tire is width W = 500 mm × length L = 200 mm. The maximum load of one wheel was 50 kN.

14 (b) is a diagram showing the load when the vehicle passes in the C direction in FIG. 13 (a), and FIG. 14 (c) shows the load when the vehicle passes in the D direction in FIG. 13 (a). It is a figure which shows the load at the time of doing.

As shown in FIG. 14 (b), when the vehicle (tire) traverses the trough track 50, the upper part of the grating lid (in the E portion in the figure) corresponding to the inner width of the trough body within the tire installation width of 500 mm. A load of 28 kN (G in the figure) is applied to the tire (200 mm), and a load of 21 kN is applied to both sides (F in the figure, each of which is 150 mm). On the other hand, as shown in FIG. 14 (c), when the vehicle (tire) crosses the trough track 50, the mounting length of the tire 200 mm corresponds to the inner width of the trough body, and the upper part of the grating lid (E in the figure). The part is 200 mm), and the load is 70 kN. Therefore, the evaluation was performed under the stricter vehicle crossing conditions (direction D in FIG. 13A).

As shown in FIG. 15, a laser displacement meter 71 was installed inside the trough main body 3 toward the inner surfaces of both side portions 7 and the lower surface of the grating lid 5. In this state, the vehicle crossed the upper part of the portion and the displacement of each portion at that time was measured.

As a result, in the case of the reinforced concrete lid, the lower surface position of the trough lid was lowered by a maximum of 1.7 mm when the vehicle passed. This displacement is due to the total deformation of the trough body and the trough lid. When the trough lid was checked after the vehicle passed, no damage was found.

When the same evaluation was performed when the grating lid 5 was used, the displacement of the lower surface position of the grating lid 5 when the vehicle passed was a maximum of 1.6 mm, and when the grating lid 5 after the vehicle passed was confirmed, it was damaged. Was not seen. As described above, it was found that the grating lid 5 has a load bearing capacity equivalent to that of the reinforced concrete lid.

Further, when a repetitive load of 0 to 50 kN was applied to the upper surface of the grating lid 5 with the trough main body 3 and the grating lid 5 fixed, no damage was observed even with the repetitive load of 100,000 times.

Although the embodiments of the present invention have been described above with reference to the attached drawings, the technical scope of the present invention does not depend on the above-described embodiments. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical ideas described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs to.

1, 1a ......... Attaching structure of the grating lid to the trough body 3 ......... Trough body 5, 5a, 5b ......... Grating lid 6 ......... Resin trough lid 7 ......... Side 9 ......... Bottom 11 ………… Vertical ribs 13, 13a ………… Horizontal ribs 15 ………… Female type fitting part 17 ………… Male type fitting part 19 ………… Fixing metal fittings 21 ………… Fixing metal fittings mounting part 23 ………… L-shaped members 25a, 25b ………… Mounting holes 27 ………… Frame 29 ………… Lattice 29a ………… Flat steel plate 29b ………… Rod-shaped steel 31 ………… L-shaped flange member 33 ………… Bolt fixing part 35 ………… Steel plate with mounting holes 37 ………… Mounting holes 39 ………… Fillers 41, 45 ………… Bolts 43, 47 ………… Nuts 49, 53 ………… Expanded diameter 50 ………… Trough line 51 , 55 ………… Reduced diameter 57 ………… Substrate 59 ………… LED light source 61 ………… Epoxy resin 63 ………… Steel plate 64 ………… Asphalt 65 ………… Soil 67 ………… Grating 69 ………… Mortal 71 ……… Laser displacement meter

Further, by adopting a structure in which the resin trough lid can be directly fixed instead of attaching the L-shaped member to the fixing bracket mounting portion, the conventional fixing structure can be obtained.

Instead of attaching the L-shaped member for accommodating the grating lid to the fixing bracket mounting portion of the horizontal rib, a resin trough lid may be directly fixed .

The fifth invention is a grating lid that is crowned and fixed to the upper part of the side portion of the trough main body, and the grating lid has a structure in which a large number of lattices are formed inside a substantially rectangular frame. However, in the grating lid, a part of the grating of the grating lid is cut out in the lattice near the front end portion and the rear end portion, and a steel plate with a mounting hole is welded to the notch portion of the lattice. , A bolt fixing portion of the grating lid is formed, and an L-shaped flange member bent in an L shape is formed on one side of the grating lid in the longitudinal direction to form a tongue piece having a length corresponding to the connection portion of the trough body. It is a grating lid characterized by being welded so as to form a protrusion.

Further, since the grating lid 5 is not directly attached to the side portion 7 of the trough main body 3, it is not necessary to process the side portion 7 of the trough main body 3. As described above, since it is not necessary to machine the trough body 3 at all, it is possible to prevent stress concentration due to machining or scratches on the trough body 3. This makes it possible to increase the load bearing capacity of the trough body.

Claims (22)

It is a structure to attach the grating lid to the resin trough body.
The trough body has a substantially U-shaped cross-sectional shape having a bottom and both sides.
Vertical ribs for reinforcement are formed at predetermined intervals on the outer surfaces of both sides of the trough body having a predetermined length.
Two vertical ribs are formed in the vicinity of the front and rear ends of the trough body, and horizontal ribs for attaching an L-shaped member are formed in the vicinity of the front and rear ends of the trough body so as to connect the two vertical ribs.
A predetermined number of the vertical ribs are arranged at equal intervals between the vertical ribs at the tip of the trough body and the vertical ribs at the rear end, and further, the vertical ribs at the bottom of the side portion of the trough body. Other horizontal ribs are formed to connect the troughs,
An L-shaped member is arranged on the fixing bracket mounting portion of the horizontal rib so as to face the horizontal plane of the steel material having an L-shaped cross section and cover the top of the side portion of the trough body.
By bolting the L-shaped member to the fixing bracket attached to the lateral rib, a storage space for accommodating the grating lid is formed, and the grating lid is accommodated in the accommodation space.
A structure for mounting a grating lid to a trough body, which comprises fixing the grating lid to a bolt fixing portion which is a mounting hole formed on a horizontal surface of the L-shaped member. The grating lid has a large number of flat plate-shaped steel plates that are passed so as to connect the long sides parallel to the short side at equal intervals inside a substantially rectangular frame, and the short sides are parallel to the long side. It has a grating structure in which a large number of lattices are formed by rod-shaped steel materials passed to the upper surface of the lid so as to be connected at equal intervals.
A steel plate with mounting holes in which mounting holes are formed at two predetermined positions that are substantially symmetrical on both sides in the width direction in the vicinity of the front end portion and the rear end portion of the lattice and at positions that do not interfere with the lattice. Is welded to form the bolt fixing portion of the grating lid.
On the outer surface of one of the short sides of the grating lid, an L-shaped collar member bent in an L shape forms a tongue-shaped protrusion having a length corresponding to a connection portion between the trough bodies. The structure for attaching a grating lid to a trough body according to claim 1, wherein the grating is fixed so as to form. A U-shaped cross-section fixing bracket is provided at the fixing bracket mounting portion of the horizontal rib, the fixing bracket and the L-shaped member are fixed by a nut and a mounting bolt, and the grating lid is attached to the L-shaped member. The structure for attaching a grating lid to a trough body according to claim 2, wherein the grating lid is attached to the trough body via the L-shaped member by fixing. When the L-shaped member is attached to the fixing bracket mounting portion of the trough body via the fixing bracket, the L is inside the cross section of the trough body from the tips of both side portions of the trough body. Another mounting hole provided in the character member and the steel plate with a mounting hole of the grating lid formed by welding to the back surface of the grating lid are arranged so that the positions of the holes match each other. The structure for mounting a grating lid to a trough body according to claim 3, wherein the grating lid is bolted to the trough body by fixing the steel plate with mounting holes and the L-shaped member. At least one aggregate of ceramic or natural stone is solidified and filled with an adhesive resin of either epoxy resin or urethane resin, or mortar is filled inside the lattice of the grating lid. The structure for attaching a grating lid to a trough main body according to any one of claims 1 to 4, wherein the grating lid is attached to the trough body. The first aspect of the present invention, wherein the trough lid made of resin is directly fixed to the fixing bracket mounting portion of the horizontal rib instead of attaching the L-shaped member for accommodating the grating lid. Item 5. The structure for attaching the grating lid to the trough body according to any one of Items 5. It is a structure to attach the grating lid to the resin trough body.
The trough body has a substantially U-shaped cross-sectional shape having a bottom and both sides.
A male fitting portion and a female fitting portion that can be fitted are provided at one end and the other end of the trough body having a predetermined length, respectively.
The male fitting portion has a reduced diameter portion whose cross section is reduced in diameter and an enlarged diameter portion whose cross section is bent outward at the tip of the reduced diameter portion.
The female fitting portion is formed with an enlarged diameter portion having an enlarged cross section and a reduced diameter portion having a reduced cross section at the tip of the enlarged diameter portion so that the male fitting portion can be accommodated.
Vertical ribs for reinforcement are formed at predetermined intervals on the outer surfaces of both sides of the trough body having a predetermined length.
Two vertical ribs are formed in the vicinity of the front and rear ends of the trough body, and horizontal ribs for attaching an L-shaped member are formed in the vicinity of the front and rear ends of the trough body so as to connect the two vertical ribs.
A predetermined number of the vertical ribs are arranged at equal intervals between the vertical ribs at the tip of the trough body and the vertical ribs at the rear end, and further, the vertical ribs at the bottom of the side portion of the trough body. Other horizontal ribs are formed to connect the troughs,
An L-shaped member is arranged on the fixing bracket mounting portion of the horizontal rib so as to face the horizontal plane of the steel material having an L-shaped cross section and cover the top of the side portion of the trough body.
By bolting the L-shaped member to the fixing bracket attached to the lateral rib, a storage space for accommodating the grating lid is formed, and the grating lid is accommodated in the accommodation space.
A structure for mounting a grating lid to a trough body, which comprises fixing the grating lid to a bolt fixing portion which is a mounting hole formed on a horizontal surface of the L-shaped member. The grating lid has a grating structure in which a large number of lattices are formed inside a substantially rectangular frame.
A steel plate with a mounting hole, in which a part of the lattice of the grating lid is cut out at predetermined positions near the front end portion and the rear end portion of the lattice and a mounting hole is formed, is formed in the notch portion of the lattice. Welded to form the bolted portion of the grating lid,
On the outer surface of one of the short sides of the grating lid, an L-shaped collar member bent in an L shape forms a tongue-shaped protrusion having a length corresponding to a connection portion between the trough bodies. The structure for attaching a grating lid to a trough body according to claim 7, wherein the grating is fixed so as to form. A fixing bracket having a U-shaped cross section is provided at the fixing bracket mounting portion of the horizontal rib, the fixing bracket and the L-shaped member are fixed with bolts, and the grating lid is fixed to the L-shaped member. The structure for attaching a grating lid to a trough body according to claim 8, wherein the grating lid is attached to the trough body via the L-shaped member. Inside the cross section of the trough body from the tips of both sides of the trough body, a mounting hole provided in the L-shaped member and a part of the lattice of the grating lid are cut out to form a steel plate with mounting holes. 9. The mounting structure of the grating lid to the trough body described in either. At least one aggregate of ceramic or natural stone is solidified and filled with an adhesive resin of either epoxy resin or urethane resin, or mortar is filled inside the lattice of the grating lid. 7. The structure for attaching a grating lid to a trough main body according to any one of claims 7 to 10. The invention according to any one of claims 7 to 10, wherein a steel plate having a satin-like surface or a non-slip processed steel plate is welded to the upper surface of the grating lid. Mounting structure of the grating lid to the trough body. According to claim 7, a resin trough lid is directly fixed to the fixing bracket mounting portion of the horizontal rib instead of mounting the L-shaped member for accommodating the grating lid. Item 2. The structure for attaching the grating lid to the trough body according to any one of Items 12. It has the structure for attaching the grating lid to the trough main body according to any one of claims 7 to 12, and is characterized in that the trough main body and the grating lid are repeatedly connected to each other in large numbers. Trough track. The trough track according to claim 14, wherein the trough track has a bend at least a part thereof. The trough line has a structure for attaching a grating lid to the trough body according to claim 8, and the trough body and the grating lids are repeatedly connected to each other to form a trough line, which is a part of a straight portion of the trough line. A trough line characterized in that the grating lid having no L-shaped flange member is covered at predetermined intervals. In a part of the trough line, instead of attaching the grating lid, a plurality of resin trough lids are continuously connected and directly fixed to the fixing bracket mounting portion of the lateral rib, whereby the grating lid is covered. The trough line according to claim 14, wherein the line is continuously formed and the trough line covered with the resin trough lid is formed. A method for forming a trough line using the structure for attaching a grating lid to a trough body according to claim 8.
The male fitting portion of one of the trough bodies is fitted and connected to the female fitting portion of the other trough body, and one of the gratings is further used with two grating lids. The grating lid is connected by placing the lid on the L-shaped flange member of the other grating lid, and further, the male fitting portion and the female fitting portion of the trough body are connected. A method for forming a trough line, wherein the grating lid and the trough body are repeatedly connected to each other to form a line. The method for forming a trough line according to claim 18, wherein the direction of the male fitting portion of the trough body and the direction of the L-shaped flange member of the grating lid are arranged in opposite directions to each other. .. The grating lid has a structure in which a large number of lattices are formed inside a substantially rectangular frame, and the gratings in the vicinity of the front end portion and the rear end portion of the grating lid have a structure. A part of the lattice of the grating lid is cut out, a steel plate with a mounting hole is welded to the notch portion of the grating to form a bolt fixing portion of the grating lid, and one of the grating lids in the longitudinal direction is formed. A grating lid characterized in that an L-shaped flange member bent into an L-shape is fixed to the side so as to form a tongue-shaped protrusion having a length corresponding to the connection portion of the trough body. The inside of the lattice is characterized in that at least one aggregate of ceramic or natural stone is solidified and filled with a resin of either an epoxy resin or a urethane resin, or is filled with mortar. 20. The grating lid. An LED light source placed on a substrate is arranged inside at least a part of the lattice, and the LED light source is fixed by an epoxy resin or a urethane resin filled in the lattice, and further, the substrate. 20 is the grating lid according to claim 20, wherein the grating lid is arranged on the back surface of the grating lid.

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